diff --git a/sql/reports/challenges/winners.sql b/sql/reports/challenges/winners.sql
index b45e236..85ac684 100644
--- a/sql/reports/challenges/winners.sql
+++ b/sql/reports/challenges/winners.sql
@@ -10,7 +10,9 @@ WITH challenge_context AS (
 ),
 submission_metrics AS (
   SELECT
+    s.id AS submission_id,
     s."memberId",
+    COALESCE(s."submittedDate", s."createdAt") AS submission_timestamp,
     COALESCE(
       final_review."aggregateScore",
       s."finalScore"::double precision,
@@ -96,26 +98,32 @@ standard_member_scores AS (
   FROM submission_metrics AS sm
   GROUP BY sm."memberId"
 ),
-mm_member_scores AS (
-  SELECT
+mm_latest_submission_scores AS (
+  SELECT DISTINCT ON (sm."memberId")
     sm."memberId",
-    MAX(sm.provisional_score) AS provisional_score_raw,
-    MAX(sm.final_score_raw) AS final_score_raw
+    sm.provisional_score AS provisional_score_raw,
+    sm.final_score_raw
   FROM submission_metrics AS sm
-  GROUP BY sm."memberId"
+  WHERE
+    sm.provisional_score IS NOT NULL
+    OR sm.final_score_raw IS NOT NULL
+  ORDER BY
+    sm."memberId",
+    sm.submission_timestamp DESC NULLS LAST,
+    sm.submission_id DESC
 ),
 mm_winner_scores AS (
   SELECT
-    mms."memberId",
+    mlss."memberId",
     CASE
-      WHEN mms.provisional_score_raw IS NULL THEN NULL
-      ELSE ROUND(mms.provisional_score_raw::numeric, 2)
+      WHEN mlss.provisional_score_raw IS NULL THEN NULL
+      ELSE ROUND(mlss.provisional_score_raw::numeric, 2)
     END AS "provisionalScore",
     CASE
-      WHEN mms.final_score_raw IS NULL THEN NULL
-      ELSE ROUND(mms.final_score_raw::numeric, 2)
+      WHEN mlss.final_score_raw IS NULL THEN NULL
+      ELSE ROUND(mlss.final_score_raw::numeric, 2)
     END AS "finalScore"
-  FROM mm_member_scores AS mms
+  FROM mm_latest_submission_scores AS mlss
 )
 SELECT
   COALESCE(
diff --git a/src/reports/challenges/challenge-export-sql.spec.ts b/src/reports/challenges/challenge-export-sql.spec.ts
index ebc7157..2023771 100644
--- a/src/reports/challenges/challenge-export-sql.spec.ts
+++ b/src/reports/challenges/challenge-export-sql.spec.ts
@@ -74,6 +74,22 @@ describe("Challenge export SQL", () => {
     );
   });
 
+  it.each(challengeUserSqlPaths)(
+    "uses the latest usable Marathon Match scored submission in %s",
+    (sqlPath) => {
+      const sql = sqlLoader.load(sqlPath);
+
+      expect(sql).toMatch(/SELECT DISTINCT ON \(\w+\."memberId"\)/);
+      expect(sql).toMatch(
+        /ORDER BY\s+\w+\."memberId",\s+\w+\.submission_timestamp DESC NULLS LAST,\s+\w+\.submission_id DESC/,
+      );
+      expect(sql).not.toMatch(
+        /MAX\(\w+\.provisional_score\) AS provisional_score_raw/,
+      );
+      expect(sql).not.toMatch(/MAX\(\w+\.final_score_raw\) AS final_score_raw/);
+    },
+  );
+
   it("only returns Marathon Match winner finalRank for completed challenges", () => {
     const sql = sqlLoader.load("reports/challenges/winners.sql");
 
diff --git a/src/reports/report-directory.data.ts b/src/reports/report-directory.data.ts
index cb470c4..3c110a2 100644
--- a/src/reports/report-directory.data.ts
+++ b/src/reports/report-directory.data.ts
@@ -428,7 +428,7 @@ const REGISTERED_REPORTS_DIRECTORY: RegisteredReportsDirectory = {
       challengeReport(
         "Challenge Winners",
         "/challenges/:challengeId/winners",
-        "Return the challenge winners report with placement winners only. Marathon Match exports include non-failed provisionalScore and completed challenge finalScore/finalRank values.",
+        "Return the challenge winners report with placement winners only. Marathon Match exports use the latest non-failed provisionalScore and include completed challenge finalScore/finalRank values.",
         AppScopes.Challenge.Winners,
         [challengeIdParam],
       ),